H - Electricity – 03 – M
Patent
H - Electricity
03
M
354/68
H03M 3/04 (2006.01)
Patent
CA 1258532
Abstract of the Disclosure: In a predictive coding device which is for coding an input signal into a coded signal, such as a PCM signal, and is for use in combination with a transmission line having an on and an off state wherein the coding device is selectively connected to the transmission line and disconnected therefrom, a code converter (16) is for operative coupling the transmission line to produce a mute signal of a predetermined code as a first local output signal and the coded signal as a second local output signal when the transmission line is in the off and the on states, respectively. A local decoder (15) locally decodes either the first or the second local output signal into a local decoded signal for use in coding the input signal into the coded signal. Preferably, the predetermined code is a code which the coded signal has when the input signal carries no information. Usually, the coding device is selectively connected to the transmission line and disconnected therefrom through a digital speech interpolation (DSI) device.
519680
Corporation Nec
Smart & Biggar
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